
Add-on for Firefox that allows you to post to Twitter through the bar in the browser.
How about getting away from the serious look of Firefox and having organized tabs?
Utility that displays the details of all bookmarks stored in Chrome and Firefox Web browsers.

Get notified every time someone deletes you from Facebook with this Chrome extension.
Shorten, recommend, or share content with your friends from any site with this extension for Chrome!
Modified version of Google Chrome that adds several extra features.